ide-floppy.c revision 125e18745f16685f69a34fd6130d47598fc4bf54
1/* 2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002 3 * 4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> 5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net> 6 */ 7 8/* 9 * IDE ATAPI floppy driver. 10 * 11 * The driver currently doesn't have any fancy features, just the bare 12 * minimum read/write support. 13 * 14 * This driver supports the following IDE floppy drives: 15 * 16 * LS-120/240 SuperDisk 17 * Iomega Zip 100/250 18 * Iomega PC Card Clik!/PocketZip 19 * 20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many 21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. 22 * 23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. 24 * Ver 0.2 Oct 31 96 Minor changes. 25 * Ver 0.3 Dec 2 96 Fixed error recovery bug. 26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. 27 * Ver 0.5 Feb 21 97 Add partitions support. 28 * Use the minimum of the LBA and CHS capacities. 29 * Avoid hwgroup->rq == NULL on the last irq. 30 * Fix potential null dereferencing with DEBUG_LOG. 31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. 32 * Add media write-protect detection. 33 * Issue START command only if TEST UNIT READY fails. 34 * Add work-around for IOMEGA ZIP revision 21.D. 35 * Remove idefloppy_get_capabilities(). 36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of 37 * bytes requested on each interrupt to be zero. 38 * Thanks to <shanos@es.co.nz> for pointing this out. 39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> 40 * Implement low level formatting. Reimplemented 41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp 42 * bit. My LS-120 drive barfs on 43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. 44 * Compromise by not reporting a failure to get this 45 * mode page. Implemented four IOCTLs in order to 46 * implement formatting. IOCTls begin with 0x4600, 47 * 0x46 is 'F' as in Format. 48 * Jan 9 01 Userland option to select format verify. 49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives 50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and 51 * return a sense error. Suppress error reporting in 52 * this particular case in order to avoid spurious 53 * errors in syslog. The culprit is 54 * idefloppy_get_capability_page(), so move it to 55 * idefloppy_begin_format() so that it's not used 56 * unless absolutely necessary. 57 * If drive does not support format progress indication 58 * monitor the dsc bit in the status register. 59 * Also, O_NDELAY on open will allow the device to be 60 * opened without a disk available. This can be used to 61 * open an unformatted disk, or get the device capacity. 62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by 63 * <paul@paulbristow.net> 64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this 65 * driver. Included Powerbook internal zip kludge. 66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive 67 * no disk on insert and disk change now works 68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere 69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 71 * including set_bit patch from Rusty Russell 72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series 73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to 75 * fix a lost interrupt problem. It appears the busy 76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100 77 * drive before the drive was actually ready. 78 * Ver 0.98a Oct 29 01 Expose delay value so we can play. 79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code 80 * to support new PocketZip drives 81 */ 82 83#define IDEFLOPPY_VERSION "0.99.newide" 84 85#include <linux/config.h> 86#include <linux/module.h> 87#include <linux/types.h> 88#include <linux/string.h> 89#include <linux/kernel.h> 90#include <linux/delay.h> 91#include <linux/timer.h> 92#include <linux/mm.h> 93#include <linux/interrupt.h> 94#include <linux/major.h> 95#include <linux/errno.h> 96#include <linux/genhd.h> 97#include <linux/slab.h> 98#include <linux/cdrom.h> 99#include <linux/ide.h> 100#include <linux/bitops.h> 101#include <linux/mutex.h> 102 103#include <asm/byteorder.h> 104#include <asm/irq.h> 105#include <asm/uaccess.h> 106#include <asm/io.h> 107#include <asm/unaligned.h> 108 109/* 110 * The following are used to debug the driver. 111 */ 112#define IDEFLOPPY_DEBUG_LOG 0 113#define IDEFLOPPY_DEBUG_INFO 0 114#define IDEFLOPPY_DEBUG_BUGS 1 115 116/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 117#define IDEFLOPPY_DEBUG( fmt, args... ) 118 119#if IDEFLOPPY_DEBUG_LOG 120#define debug_log printk 121#else 122#define debug_log(fmt, args... ) do {} while(0) 123#endif 124 125 126/* 127 * Some drives require a longer irq timeout. 128 */ 129#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 130 131/* 132 * After each failed packet command we issue a request sense command 133 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 134 */ 135#define IDEFLOPPY_MAX_PC_RETRIES 3 136 137/* 138 * With each packet command, we allocate a buffer of 139 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 140 */ 141#define IDEFLOPPY_PC_BUFFER_SIZE 256 142 143/* 144 * In various places in the driver, we need to allocate storage 145 * for packet commands and requests, which will remain valid while 146 * we leave the driver to wait for an interrupt or a timeout event. 147 */ 148#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 149 150/* 151 * Our view of a packet command. 152 */ 153typedef struct idefloppy_packet_command_s { 154 u8 c[12]; /* Actual packet bytes */ 155 int retries; /* On each retry, we increment retries */ 156 int error; /* Error code */ 157 int request_transfer; /* Bytes to transfer */ 158 int actually_transferred; /* Bytes actually transferred */ 159 int buffer_size; /* Size of our data buffer */ 160 int b_count; /* Missing/Available data on the current buffer */ 161 struct request *rq; /* The corresponding request */ 162 u8 *buffer; /* Data buffer */ 163 u8 *current_position; /* Pointer into the above buffer */ 164 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 165 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 166 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 167} idefloppy_pc_t; 168 169/* 170 * Packet command flag bits. 171 */ 172#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 173#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 174#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 175#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 176#define PC_WRITING 5 /* Data direction */ 177 178#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 179 180/* 181 * Removable Block Access Capabilities Page 182 */ 183typedef struct { 184#if defined(__LITTLE_ENDIAN_BITFIELD) 185 unsigned page_code :6; /* Page code - Should be 0x1b */ 186 unsigned reserved1_6 :1; /* Reserved */ 187 unsigned ps :1; /* Should be 0 */ 188#elif defined(__BIG_ENDIAN_BITFIELD) 189 unsigned ps :1; /* Should be 0 */ 190 unsigned reserved1_6 :1; /* Reserved */ 191 unsigned page_code :6; /* Page code - Should be 0x1b */ 192#else 193#error "Bitfield endianness not defined! Check your byteorder.h" 194#endif 195 u8 page_length; /* Page Length - Should be 0xa */ 196#if defined(__LITTLE_ENDIAN_BITFIELD) 197 unsigned reserved2 :6; 198 unsigned srfp :1; /* Supports reporting progress of format */ 199 unsigned sflp :1; /* System floppy type device */ 200 unsigned tlun :3; /* Total logical units supported by the device */ 201 unsigned reserved3 :3; 202 unsigned sml :1; /* Single / Multiple lun supported */ 203 unsigned ncd :1; /* Non cd optical device */ 204#elif defined(__BIG_ENDIAN_BITFIELD) 205 unsigned sflp :1; /* System floppy type device */ 206 unsigned srfp :1; /* Supports reporting progress of format */ 207 unsigned reserved2 :6; 208 unsigned ncd :1; /* Non cd optical device */ 209 unsigned sml :1; /* Single / Multiple lun supported */ 210 unsigned reserved3 :3; 211 unsigned tlun :3; /* Total logical units supported by the device */ 212#else 213#error "Bitfield endianness not defined! Check your byteorder.h" 214#endif 215 u8 reserved[8]; 216} idefloppy_capabilities_page_t; 217 218/* 219 * Flexible disk page. 220 */ 221typedef struct { 222#if defined(__LITTLE_ENDIAN_BITFIELD) 223 unsigned page_code :6; /* Page code - Should be 0x5 */ 224 unsigned reserved1_6 :1; /* Reserved */ 225 unsigned ps :1; /* The device is capable of saving the page */ 226#elif defined(__BIG_ENDIAN_BITFIELD) 227 unsigned ps :1; /* The device is capable of saving the page */ 228 unsigned reserved1_6 :1; /* Reserved */ 229 unsigned page_code :6; /* Page code - Should be 0x5 */ 230#else 231#error "Bitfield endianness not defined! Check your byteorder.h" 232#endif 233 u8 page_length; /* Page Length - Should be 0x1e */ 234 u16 transfer_rate; /* In kilobits per second */ 235 u8 heads, sectors; /* Number of heads, Number of sectors per track */ 236 u16 sector_size; /* Byes per sector */ 237 u16 cyls; /* Number of cylinders */ 238 u8 reserved10[10]; 239 u8 motor_delay; /* Motor off delay */ 240 u8 reserved21[7]; 241 u16 rpm; /* Rotations per minute */ 242 u8 reserved30[2]; 243} idefloppy_flexible_disk_page_t; 244 245/* 246 * Format capacity 247 */ 248typedef struct { 249 u8 reserved[3]; 250 u8 length; /* Length of the following descriptors in bytes */ 251} idefloppy_capacity_header_t; 252 253typedef struct { 254 u32 blocks; /* Number of blocks */ 255#if defined(__LITTLE_ENDIAN_BITFIELD) 256 unsigned dc :2; /* Descriptor Code */ 257 unsigned reserved :6; 258#elif defined(__BIG_ENDIAN_BITFIELD) 259 unsigned reserved :6; 260 unsigned dc :2; /* Descriptor Code */ 261#else 262#error "Bitfield endianness not defined! Check your byteorder.h" 263#endif 264 u8 length_msb; /* Block Length (MSB)*/ 265 u16 length; /* Block Length */ 266} idefloppy_capacity_descriptor_t; 267 268#define CAPACITY_INVALID 0x00 269#define CAPACITY_UNFORMATTED 0x01 270#define CAPACITY_CURRENT 0x02 271#define CAPACITY_NO_CARTRIDGE 0x03 272 273/* 274 * Most of our global data which we need to save even as we leave the 275 * driver due to an interrupt or a timer event is stored in a variable 276 * of type idefloppy_floppy_t, defined below. 277 */ 278typedef struct ide_floppy_obj { 279 ide_drive_t *drive; 280 ide_driver_t *driver; 281 struct gendisk *disk; 282 struct kref kref; 283 284 /* Current packet command */ 285 idefloppy_pc_t *pc; 286 /* Last failed packet command */ 287 idefloppy_pc_t *failed_pc; 288 /* Packet command stack */ 289 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 290 /* Next free packet command storage space */ 291 int pc_stack_index; 292 struct request rq_stack[IDEFLOPPY_PC_STACK]; 293 /* We implement a circular array */ 294 int rq_stack_index; 295 296 /* 297 * Last error information 298 */ 299 u8 sense_key, asc, ascq; 300 /* delay this long before sending packet command */ 301 u8 ticks; 302 int progress_indication; 303 304 /* 305 * Device information 306 */ 307 /* Current format */ 308 int blocks, block_size, bs_factor; 309 /* Last format capacity */ 310 idefloppy_capacity_descriptor_t capacity; 311 /* Copy of the flexible disk page */ 312 idefloppy_flexible_disk_page_t flexible_disk_page; 313 /* Write protect */ 314 int wp; 315 /* Supports format progress report */ 316 int srfp; 317 /* Status/Action flags */ 318 unsigned long flags; 319} idefloppy_floppy_t; 320 321#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 322 323/* 324 * Floppy flag bits values. 325 */ 326#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 327#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 328#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 329#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 330#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 331#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 332 333/* 334 * ATAPI floppy drive packet commands 335 */ 336#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 337#define IDEFLOPPY_INQUIRY_CMD 0x12 338#define IDEFLOPPY_MODE_SELECT_CMD 0x55 339#define IDEFLOPPY_MODE_SENSE_CMD 0x5a 340#define IDEFLOPPY_READ10_CMD 0x28 341#define IDEFLOPPY_READ12_CMD 0xa8 342#define IDEFLOPPY_READ_CAPACITY_CMD 0x23 343#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 344#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e 345#define IDEFLOPPY_SEEK_CMD 0x2b 346#define IDEFLOPPY_START_STOP_CMD 0x1b 347#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 348#define IDEFLOPPY_VERIFY_CMD 0x2f 349#define IDEFLOPPY_WRITE10_CMD 0x2a 350#define IDEFLOPPY_WRITE12_CMD 0xaa 351#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e 352 353/* 354 * Defines for the mode sense command 355 */ 356#define MODE_SENSE_CURRENT 0x00 357#define MODE_SENSE_CHANGEABLE 0x01 358#define MODE_SENSE_DEFAULT 0x02 359#define MODE_SENSE_SAVED 0x03 360 361/* 362 * IOCTLs used in low-level formatting. 363 */ 364 365#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 366#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 367#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 368#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 369 370#if 0 371/* 372 * Special requests for our block device strategy routine. 373 */ 374#define IDEFLOPPY_FIRST_RQ 90 375 376/* 377 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue. 378 */ 379#define IDEFLOPPY_PC_RQ 90 380 381#define IDEFLOPPY_LAST_RQ 90 382 383/* 384 * A macro which can be used to check if a given request command 385 * originated in the driver or in the buffer cache layer. 386 */ 387#define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ)) 388 389#endif 390 391/* 392 * Error codes which are returned in rq->errors to the higher part 393 * of the driver. 394 */ 395#define IDEFLOPPY_ERROR_GENERAL 101 396 397/* 398 * The following is used to format the general configuration word of 399 * the ATAPI IDENTIFY DEVICE command. 400 */ 401struct idefloppy_id_gcw { 402#if defined(__LITTLE_ENDIAN_BITFIELD) 403 unsigned packet_size :2; /* Packet Size */ 404 unsigned reserved234 :3; /* Reserved */ 405 unsigned drq_type :2; /* Command packet DRQ type */ 406 unsigned removable :1; /* Removable media */ 407 unsigned device_type :5; /* Device type */ 408 unsigned reserved13 :1; /* Reserved */ 409 unsigned protocol :2; /* Protocol type */ 410#elif defined(__BIG_ENDIAN_BITFIELD) 411 unsigned protocol :2; /* Protocol type */ 412 unsigned reserved13 :1; /* Reserved */ 413 unsigned device_type :5; /* Device type */ 414 unsigned removable :1; /* Removable media */ 415 unsigned drq_type :2; /* Command packet DRQ type */ 416 unsigned reserved234 :3; /* Reserved */ 417 unsigned packet_size :2; /* Packet Size */ 418#else 419#error "Bitfield endianness not defined! Check your byteorder.h" 420#endif 421}; 422 423/* 424 * INQUIRY packet command - Data Format 425 */ 426typedef struct { 427#if defined(__LITTLE_ENDIAN_BITFIELD) 428 unsigned device_type :5; /* Peripheral Device Type */ 429 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 430 unsigned reserved1_6t0 :7; /* Reserved */ 431 unsigned rmb :1; /* Removable Medium Bit */ 432 unsigned ansi_version :3; /* ANSI Version */ 433 unsigned ecma_version :3; /* ECMA Version */ 434 unsigned iso_version :2; /* ISO Version */ 435 unsigned response_format :4; /* Response Data Format */ 436 unsigned reserved3_45 :2; /* Reserved */ 437 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 438 unsigned reserved3_7 :1; /* AENC - Reserved */ 439#elif defined(__BIG_ENDIAN_BITFIELD) 440 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 441 unsigned device_type :5; /* Peripheral Device Type */ 442 unsigned rmb :1; /* Removable Medium Bit */ 443 unsigned reserved1_6t0 :7; /* Reserved */ 444 unsigned iso_version :2; /* ISO Version */ 445 unsigned ecma_version :3; /* ECMA Version */ 446 unsigned ansi_version :3; /* ANSI Version */ 447 unsigned reserved3_7 :1; /* AENC - Reserved */ 448 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 449 unsigned reserved3_45 :2; /* Reserved */ 450 unsigned response_format :4; /* Response Data Format */ 451#else 452#error "Bitfield endianness not defined! Check your byteorder.h" 453#endif 454 u8 additional_length; /* Additional Length (total_length-4) */ 455 u8 rsv5, rsv6, rsv7; /* Reserved */ 456 u8 vendor_id[8]; /* Vendor Identification */ 457 u8 product_id[16]; /* Product Identification */ 458 u8 revision_level[4]; /* Revision Level */ 459 u8 vendor_specific[20]; /* Vendor Specific - Optional */ 460 u8 reserved56t95[40]; /* Reserved - Optional */ 461 /* Additional information may be returned */ 462} idefloppy_inquiry_result_t; 463 464/* 465 * REQUEST SENSE packet command result - Data Format. 466 */ 467typedef struct { 468#if defined(__LITTLE_ENDIAN_BITFIELD) 469 unsigned error_code :7; /* Current error (0x70) */ 470 unsigned valid :1; /* The information field conforms to SFF-8070i */ 471 u8 reserved1 :8; /* Reserved */ 472 unsigned sense_key :4; /* Sense Key */ 473 unsigned reserved2_4 :1; /* Reserved */ 474 unsigned ili :1; /* Incorrect Length Indicator */ 475 unsigned reserved2_67 :2; 476#elif defined(__BIG_ENDIAN_BITFIELD) 477 unsigned valid :1; /* The information field conforms to SFF-8070i */ 478 unsigned error_code :7; /* Current error (0x70) */ 479 u8 reserved1 :8; /* Reserved */ 480 unsigned reserved2_67 :2; 481 unsigned ili :1; /* Incorrect Length Indicator */ 482 unsigned reserved2_4 :1; /* Reserved */ 483 unsigned sense_key :4; /* Sense Key */ 484#else 485#error "Bitfield endianness not defined! Check your byteorder.h" 486#endif 487 u32 information __attribute__ ((packed)); 488 u8 asl; /* Additional sense length (n-7) */ 489 u32 command_specific; /* Additional command specific information */ 490 u8 asc; /* Additional Sense Code */ 491 u8 ascq; /* Additional Sense Code Qualifier */ 492 u8 replaceable_unit_code; /* Field Replaceable Unit Code */ 493 u8 sksv[3]; 494 u8 pad[2]; /* Padding to 20 bytes */ 495} idefloppy_request_sense_result_t; 496 497/* 498 * Pages of the SELECT SENSE / MODE SENSE packet commands. 499 */ 500#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 501#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 502 503/* 504 * Mode Parameter Header for the MODE SENSE packet command 505 */ 506typedef struct { 507 u16 mode_data_length; /* Length of the following data transfer */ 508 u8 medium_type; /* Medium Type */ 509#if defined(__LITTLE_ENDIAN_BITFIELD) 510 unsigned reserved3 :7; 511 unsigned wp :1; /* Write protect */ 512#elif defined(__BIG_ENDIAN_BITFIELD) 513 unsigned wp :1; /* Write protect */ 514 unsigned reserved3 :7; 515#else 516#error "Bitfield endianness not defined! Check your byteorder.h" 517#endif 518 u8 reserved[4]; 519} idefloppy_mode_parameter_header_t; 520 521static DEFINE_MUTEX(idefloppy_ref_mutex); 522 523#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 524 525#define ide_floppy_g(disk) \ 526 container_of((disk)->private_data, struct ide_floppy_obj, driver) 527 528static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 529{ 530 struct ide_floppy_obj *floppy = NULL; 531 532 mutex_lock(&idefloppy_ref_mutex); 533 floppy = ide_floppy_g(disk); 534 if (floppy) 535 kref_get(&floppy->kref); 536 mutex_unlock(&idefloppy_ref_mutex); 537 return floppy; 538} 539 540static void ide_floppy_release(struct kref *); 541 542static void ide_floppy_put(struct ide_floppy_obj *floppy) 543{ 544 mutex_lock(&idefloppy_ref_mutex); 545 kref_put(&floppy->kref, ide_floppy_release); 546 mutex_unlock(&idefloppy_ref_mutex); 547} 548 549/* 550 * Too bad. The drive wants to send us data which we are not ready to accept. 551 * Just throw it away. 552 */ 553static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 554{ 555 while (bcount--) 556 (void) HWIF(drive)->INB(IDE_DATA_REG); 557} 558 559#if IDEFLOPPY_DEBUG_BUGS 560static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 561{ 562 while (bcount--) 563 HWIF(drive)->OUTB(0, IDE_DATA_REG); 564} 565#endif /* IDEFLOPPY_DEBUG_BUGS */ 566 567 568/* 569 * idefloppy_do_end_request is used to finish servicing a request. 570 * 571 * For read/write requests, we will call ide_end_request to pass to the 572 * next buffer. 573 */ 574static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 575{ 576 idefloppy_floppy_t *floppy = drive->driver_data; 577 struct request *rq = HWGROUP(drive)->rq; 578 int error; 579 580 debug_log(KERN_INFO "Reached idefloppy_end_request\n"); 581 582 switch (uptodate) { 583 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 584 case 1: error = 0; break; 585 default: error = uptodate; 586 } 587 if (error) 588 floppy->failed_pc = NULL; 589 /* Why does this happen? */ 590 if (!rq) 591 return 0; 592 if (!(rq->flags & REQ_SPECIAL)) { //if (!IDEFLOPPY_RQ_CMD (rq->cmd)) { 593 /* our real local end request function */ 594 ide_end_request(drive, uptodate, nsecs); 595 return 0; 596 } 597 rq->errors = error; 598 /* fixme: need to move this local also */ 599 ide_end_drive_cmd(drive, 0, 0); 600 return 0; 601} 602 603static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 604{ 605 struct request *rq = pc->rq; 606 struct bio_vec *bvec; 607 struct bio *bio; 608 unsigned long flags; 609 char *data; 610 int count, i, done = 0; 611 612 rq_for_each_bio(bio, rq) { 613 bio_for_each_segment(bvec, bio, i) { 614 if (!bcount) 615 break; 616 617 count = min(bvec->bv_len, bcount); 618 619 data = bvec_kmap_irq(bvec, &flags); 620 drive->hwif->atapi_input_bytes(drive, data, count); 621 bvec_kunmap_irq(data, &flags); 622 623 bcount -= count; 624 pc->b_count += count; 625 done += count; 626 } 627 } 628 629 idefloppy_do_end_request(drive, 1, done >> 9); 630 631 if (bcount) { 632 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 633 idefloppy_discard_data(drive, bcount); 634 } 635} 636 637static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 638{ 639 struct request *rq = pc->rq; 640 struct bio *bio; 641 struct bio_vec *bvec; 642 unsigned long flags; 643 int count, i, done = 0; 644 char *data; 645 646 rq_for_each_bio(bio, rq) { 647 bio_for_each_segment(bvec, bio, i) { 648 if (!bcount) 649 break; 650 651 count = min(bvec->bv_len, bcount); 652 653 data = bvec_kmap_irq(bvec, &flags); 654 drive->hwif->atapi_output_bytes(drive, data, count); 655 bvec_kunmap_irq(data, &flags); 656 657 bcount -= count; 658 pc->b_count += count; 659 done += count; 660 } 661 } 662 663 idefloppy_do_end_request(drive, 1, done >> 9); 664 665#if IDEFLOPPY_DEBUG_BUGS 666 if (bcount) { 667 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 668 idefloppy_write_zeros(drive, bcount); 669 } 670#endif 671} 672 673static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 674{ 675 struct request *rq = pc->rq; 676 struct bio *bio = rq->bio; 677 678 while ((bio = rq->bio) != NULL) 679 idefloppy_do_end_request(drive, 1, 0); 680} 681 682/* 683 * idefloppy_queue_pc_head generates a new packet command request in front 684 * of the request queue, before the current request, so that it will be 685 * processed immediately, on the next pass through the driver. 686 */ 687static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 688{ 689 struct ide_floppy_obj *floppy = drive->driver_data; 690 691 ide_init_drive_cmd(rq); 692 rq->buffer = (char *) pc; 693 rq->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ; 694 rq->rq_disk = floppy->disk; 695 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 696} 697 698static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 699{ 700 idefloppy_floppy_t *floppy = drive->driver_data; 701 702 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 703 floppy->pc_stack_index=0; 704 return (&floppy->pc_stack[floppy->pc_stack_index++]); 705} 706 707static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 708{ 709 idefloppy_floppy_t *floppy = drive->driver_data; 710 711 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 712 floppy->rq_stack_index = 0; 713 return (&floppy->rq_stack[floppy->rq_stack_index++]); 714} 715 716/* 717 * idefloppy_analyze_error is called on each failed packet command retry 718 * to analyze the request sense. 719 */ 720static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) 721{ 722 idefloppy_floppy_t *floppy = drive->driver_data; 723 724 floppy->sense_key = result->sense_key; 725 floppy->asc = result->asc; 726 floppy->ascq = result->ascq; 727 floppy->progress_indication = result->sksv[0] & 0x80 ? 728 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; 729 if (floppy->failed_pc) 730 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " 731 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], 732 result->sense_key, result->asc, result->ascq); 733 else 734 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " 735 "ascq = %x\n", result->sense_key, 736 result->asc, result->ascq); 737} 738 739static void idefloppy_request_sense_callback (ide_drive_t *drive) 740{ 741 idefloppy_floppy_t *floppy = drive->driver_data; 742 743 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 744 745 if (!floppy->pc->error) { 746 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); 747 idefloppy_do_end_request(drive, 1, 0); 748 } else { 749 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); 750 idefloppy_do_end_request(drive, 0, 0); 751 } 752} 753 754/* 755 * General packet command callback function. 756 */ 757static void idefloppy_pc_callback (ide_drive_t *drive) 758{ 759 idefloppy_floppy_t *floppy = drive->driver_data; 760 761 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 762 763 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 764} 765 766/* 767 * idefloppy_init_pc initializes a packet command. 768 */ 769static void idefloppy_init_pc (idefloppy_pc_t *pc) 770{ 771 memset(pc->c, 0, 12); 772 pc->retries = 0; 773 pc->flags = 0; 774 pc->request_transfer = 0; 775 pc->buffer = pc->pc_buffer; 776 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 777 pc->callback = &idefloppy_pc_callback; 778} 779 780static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 781{ 782 idefloppy_init_pc(pc); 783 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; 784 pc->c[4] = 255; 785 pc->request_transfer = 18; 786 pc->callback = &idefloppy_request_sense_callback; 787} 788 789/* 790 * idefloppy_retry_pc is called when an error was detected during the 791 * last packet command. We queue a request sense packet command in 792 * the head of the request list. 793 */ 794static void idefloppy_retry_pc (ide_drive_t *drive) 795{ 796 idefloppy_pc_t *pc; 797 struct request *rq; 798 atapi_error_t error; 799 800 error.all = HWIF(drive)->INB(IDE_ERROR_REG); 801 pc = idefloppy_next_pc_storage(drive); 802 rq = idefloppy_next_rq_storage(drive); 803 idefloppy_create_request_sense_cmd(pc); 804 idefloppy_queue_pc_head(drive, pc, rq); 805} 806 807/* 808 * idefloppy_pc_intr is the usual interrupt handler which will be called 809 * during a packet command. 810 */ 811static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 812{ 813 idefloppy_floppy_t *floppy = drive->driver_data; 814 atapi_status_t status; 815 atapi_bcount_t bcount; 816 atapi_ireason_t ireason; 817 idefloppy_pc_t *pc = floppy->pc; 818 struct request *rq = pc->rq; 819 unsigned int temp; 820 821 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", 822 __FUNCTION__); 823 824 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 825 if (HWIF(drive)->ide_dma_end(drive)) { 826 set_bit(PC_DMA_ERROR, &pc->flags); 827 } else { 828 pc->actually_transferred = pc->request_transfer; 829 idefloppy_update_buffers(drive, pc); 830 } 831 debug_log(KERN_INFO "ide-floppy: DMA finished\n"); 832 } 833 834 /* Clear the interrupt */ 835 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 836 837 if (!status.b.drq) { /* No more interrupts */ 838 debug_log(KERN_INFO "Packet command completed, %d bytes " 839 "transferred\n", pc->actually_transferred); 840 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 841 842 local_irq_enable(); 843 844 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { 845 /* Error detected */ 846 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", 847 drive->name); 848 rq->errors++; 849 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 850 printk(KERN_ERR "ide-floppy: I/O error in " 851 "request sense command\n"); 852 return ide_do_reset(drive); 853 } 854 /* Retry operation */ 855 idefloppy_retry_pc(drive); 856 /* queued, but not started */ 857 return ide_stopped; 858 } 859 pc->error = 0; 860 if (floppy->failed_pc == pc) 861 floppy->failed_pc = NULL; 862 /* Command finished - Call the callback function */ 863 pc->callback(drive); 864 return ide_stopped; 865 } 866 867 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 868 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 869 "more interrupts in DMA mode\n"); 870 (void)__ide_dma_off(drive); 871 return ide_do_reset(drive); 872 } 873 874 /* Get the number of bytes to transfer */ 875 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); 876 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); 877 /* on this interrupt */ 878 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 879 880 if (ireason.b.cod) { 881 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 882 return ide_do_reset(drive); 883 } 884 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) { 885 /* Hopefully, we will never get here */ 886 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 887 ireason.b.io ? "Write":"Read"); 888 printk(KERN_ERR "but the floppy wants us to %s !\n", 889 ireason.b.io ? "Read":"Write"); 890 return ide_do_reset(drive); 891 } 892 if (!test_bit(PC_WRITING, &pc->flags)) { 893 /* Reading - Check that we have enough space */ 894 temp = pc->actually_transferred + bcount.all; 895 if (temp > pc->request_transfer) { 896 if (temp > pc->buffer_size) { 897 printk(KERN_ERR "ide-floppy: The floppy wants " 898 "to send us more data than expected " 899 "- discarding data\n"); 900 idefloppy_discard_data(drive,bcount.all); 901 BUG_ON(HWGROUP(drive)->handler != NULL); 902 ide_set_handler(drive, 903 &idefloppy_pc_intr, 904 IDEFLOPPY_WAIT_CMD, 905 NULL); 906 return ide_started; 907 } 908 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " 909 "send us more data than expected - " 910 "allowing transfer\n"); 911 } 912 } 913 if (test_bit(PC_WRITING, &pc->flags)) { 914 if (pc->buffer != NULL) 915 /* Write the current buffer */ 916 HWIF(drive)->atapi_output_bytes(drive, 917 pc->current_position, 918 bcount.all); 919 else 920 idefloppy_output_buffers(drive, pc, bcount.all); 921 } else { 922 if (pc->buffer != NULL) 923 /* Read the current buffer */ 924 HWIF(drive)->atapi_input_bytes(drive, 925 pc->current_position, 926 bcount.all); 927 else 928 idefloppy_input_buffers(drive, pc, bcount.all); 929 } 930 /* Update the current position */ 931 pc->actually_transferred += bcount.all; 932 pc->current_position += bcount.all; 933 934 BUG_ON(HWGROUP(drive)->handler != NULL); 935 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 936 return ide_started; 937} 938 939/* 940 * This is the original routine that did the packet transfer. 941 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 942 * for that drive below. The algorithm is chosen based on drive type 943 */ 944static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 945{ 946 ide_startstop_t startstop; 947 idefloppy_floppy_t *floppy = drive->driver_data; 948 atapi_ireason_t ireason; 949 950 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 951 printk(KERN_ERR "ide-floppy: Strange, packet command " 952 "initiated yet DRQ isn't asserted\n"); 953 return startstop; 954 } 955 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 956 if (!ireason.b.cod || ireason.b.io) { 957 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 958 "issuing a packet command\n"); 959 return ide_do_reset(drive); 960 } 961 BUG_ON(HWGROUP(drive)->handler != NULL); 962 /* Set the interrupt routine */ 963 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 964 /* Send the actual packet */ 965 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 966 return ide_started; 967} 968 969 970/* 971 * What we have here is a classic case of a top half / bottom half 972 * interrupt service routine. In interrupt mode, the device sends 973 * an interrupt to signal it's ready to receive a packet. However, 974 * we need to delay about 2-3 ticks before issuing the packet or we 975 * gets in trouble. 976 * 977 * So, follow carefully. transfer_pc1 is called as an interrupt (or 978 * directly). In either case, when the device says it's ready for a 979 * packet, we schedule the packet transfer to occur about 2-3 ticks 980 * later in transfer_pc2. 981 */ 982static int idefloppy_transfer_pc2 (ide_drive_t *drive) 983{ 984 idefloppy_floppy_t *floppy = drive->driver_data; 985 986 /* Send the actual packet */ 987 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 988 /* Timeout for the packet command */ 989 return IDEFLOPPY_WAIT_CMD; 990} 991 992static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 993{ 994 idefloppy_floppy_t *floppy = drive->driver_data; 995 ide_startstop_t startstop; 996 atapi_ireason_t ireason; 997 998 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 999 printk(KERN_ERR "ide-floppy: Strange, packet command " 1000 "initiated yet DRQ isn't asserted\n"); 1001 return startstop; 1002 } 1003 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 1004 if (!ireason.b.cod || ireason.b.io) { 1005 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 1006 "while issuing a packet command\n"); 1007 return ide_do_reset(drive); 1008 } 1009 /* 1010 * The following delay solves a problem with ATAPI Zip 100 drives 1011 * where the Busy flag was apparently being deasserted before the 1012 * unit was ready to receive data. This was happening on a 1013 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 1014 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 1015 * used until after the packet is moved in about 50 msec. 1016 */ 1017 BUG_ON(HWGROUP(drive)->handler != NULL); 1018 ide_set_handler(drive, 1019 &idefloppy_pc_intr, /* service routine for packet command */ 1020 floppy->ticks, /* wait this long before "failing" */ 1021 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 1022 return ide_started; 1023} 1024 1025/** 1026 * idefloppy_should_report_error() 1027 * 1028 * Supresses error messages resulting from Medium not present 1029 */ 1030static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 1031{ 1032 if (floppy->sense_key == 0x02 && 1033 floppy->asc == 0x3a && 1034 floppy->ascq == 0x00) 1035 return 0; 1036 return 1; 1037} 1038 1039/* 1040 * Issue a packet command 1041 */ 1042static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 1043{ 1044 idefloppy_floppy_t *floppy = drive->driver_data; 1045 ide_hwif_t *hwif = drive->hwif; 1046 atapi_feature_t feature; 1047 atapi_bcount_t bcount; 1048 ide_handler_t *pkt_xfer_routine; 1049 1050#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone 1051 and have lived on another thread's stack; that stack may have become 1052 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ 1053#if IDEFLOPPY_DEBUG_BUGS 1054 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && 1055 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 1056 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - " 1057 "Two request sense in serial were issued\n"); 1058 } 1059#endif /* IDEFLOPPY_DEBUG_BUGS */ 1060#endif 1061 1062 if (floppy->failed_pc == NULL && 1063 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) 1064 floppy->failed_pc = pc; 1065 /* Set the current packet command */ 1066 floppy->pc = pc; 1067 1068 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 1069 test_bit(PC_ABORT, &pc->flags)) { 1070 /* 1071 * We will "abort" retrying a packet command in case 1072 * a legitimate error code was received. 1073 */ 1074 if (!test_bit(PC_ABORT, &pc->flags)) { 1075 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 1076 if (idefloppy_should_report_error(floppy)) 1077 printk(KERN_ERR "ide-floppy: %s: I/O error, " 1078 "pc = %2x, key = %2x, " 1079 "asc = %2x, ascq = %2x\n", 1080 drive->name, pc->c[0], 1081 floppy->sense_key, 1082 floppy->asc, floppy->ascq); 1083 } 1084 /* Giving up */ 1085 pc->error = IDEFLOPPY_ERROR_GENERAL; 1086 } 1087 floppy->failed_pc = NULL; 1088 pc->callback(drive); 1089 return ide_stopped; 1090 } 1091 1092 debug_log(KERN_INFO "Retry number - %d\n",pc->retries); 1093 1094 pc->retries++; 1095 /* We haven't transferred any data yet */ 1096 pc->actually_transferred = 0; 1097 pc->current_position = pc->buffer; 1098 bcount.all = min(pc->request_transfer, 63 * 1024); 1099 1100 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) { 1101 (void)__ide_dma_off(drive); 1102 } 1103 feature.all = 0; 1104 1105 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 1106 feature.b.dma = !hwif->dma_setup(drive); 1107 1108 if (IDE_CONTROL_REG) 1109 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); 1110 /* Use PIO/DMA */ 1111 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); 1112 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); 1113 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); 1114 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); 1115 1116 if (feature.b.dma) { /* Begin DMA, if necessary */ 1117 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 1118 hwif->dma_start(drive); 1119 } 1120 1121 /* Can we transfer the packet when we get the interrupt or wait? */ 1122 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 1123 /* wait */ 1124 pkt_xfer_routine = &idefloppy_transfer_pc1; 1125 } else { 1126 /* immediate */ 1127 pkt_xfer_routine = &idefloppy_transfer_pc; 1128 } 1129 1130 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 1131 /* Issue the packet command */ 1132 ide_execute_command(drive, WIN_PACKETCMD, 1133 pkt_xfer_routine, 1134 IDEFLOPPY_WAIT_CMD, 1135 NULL); 1136 return ide_started; 1137 } else { 1138 /* Issue the packet command */ 1139 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 1140 return (*pkt_xfer_routine) (drive); 1141 } 1142} 1143 1144static void idefloppy_rw_callback (ide_drive_t *drive) 1145{ 1146 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); 1147 1148 idefloppy_do_end_request(drive, 1, 0); 1149 return; 1150} 1151 1152static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 1153{ 1154 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " 1155 "prevent = %d\n", prevent); 1156 1157 idefloppy_init_pc(pc); 1158 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; 1159 pc->c[4] = prevent; 1160} 1161 1162static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 1163{ 1164 idefloppy_init_pc(pc); 1165 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; 1166 pc->c[7] = 255; 1167 pc->c[8] = 255; 1168 pc->request_transfer = 255; 1169} 1170 1171static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 1172 int flags) 1173{ 1174 idefloppy_init_pc(pc); 1175 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; 1176 pc->c[1] = 0x17; 1177 1178 memset(pc->buffer, 0, 12); 1179 pc->buffer[1] = 0xA2; 1180 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 1181 1182 if (flags & 1) /* Verify bit on... */ 1183 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 1184 pc->buffer[3] = 8; 1185 1186 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); 1187 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); 1188 pc->buffer_size=12; 1189 set_bit(PC_WRITING, &pc->flags); 1190} 1191 1192/* 1193 * A mode sense command is used to "sense" floppy parameters. 1194 */ 1195static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 1196{ 1197 u16 length = sizeof(idefloppy_mode_parameter_header_t); 1198 1199 idefloppy_init_pc(pc); 1200 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; 1201 pc->c[1] = 0; 1202 pc->c[2] = page_code + (type << 6); 1203 1204 switch (page_code) { 1205 case IDEFLOPPY_CAPABILITIES_PAGE: 1206 length += 12; 1207 break; 1208 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 1209 length += 32; 1210 break; 1211 default: 1212 printk(KERN_ERR "ide-floppy: unsupported page code " 1213 "in create_mode_sense_cmd\n"); 1214 } 1215 put_unaligned(htons(length), (u16 *) &pc->c[7]); 1216 pc->request_transfer = length; 1217} 1218 1219static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 1220{ 1221 idefloppy_init_pc(pc); 1222 pc->c[0] = IDEFLOPPY_START_STOP_CMD; 1223 pc->c[4] = start; 1224} 1225 1226static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 1227{ 1228 idefloppy_init_pc(pc); 1229 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; 1230} 1231 1232static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 1233{ 1234 int block = sector / floppy->bs_factor; 1235 int blocks = rq->nr_sectors / floppy->bs_factor; 1236 int cmd = rq_data_dir(rq); 1237 1238 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 1239 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 1240 block, blocks); 1241 1242 idefloppy_init_pc(pc); 1243 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 1244 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; 1245 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); 1246 } else { 1247 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; 1248 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); 1249 } 1250 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); 1251 pc->callback = &idefloppy_rw_callback; 1252 pc->rq = rq; 1253 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 1254 if (rq->flags & REQ_RW) 1255 set_bit(PC_WRITING, &pc->flags); 1256 pc->buffer = NULL; 1257 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 1258 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1259} 1260 1261static int 1262idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 1263{ 1264 /* 1265 * just support eject for now, it would not be hard to make the 1266 * REQ_BLOCK_PC support fully-featured 1267 */ 1268 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD) 1269 return 1; 1270 1271 idefloppy_init_pc(pc); 1272 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 1273 return 0; 1274} 1275 1276/* 1277 * idefloppy_do_request is our request handling function. 1278 */ 1279static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1280{ 1281 idefloppy_floppy_t *floppy = drive->driver_data; 1282 idefloppy_pc_t *pc; 1283 unsigned long block = (unsigned long)block_s; 1284 1285 debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n", 1286 rq->rq_status, 1287 rq->rq_disk ? rq->rq_disk->disk_name ? "?", 1288 rq->flags, rq->errors); 1289 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " 1290 "current_nr_sectors: %d\n", (long)rq->sector, 1291 rq->nr_sectors, rq->current_nr_sectors); 1292 1293 if (rq->errors >= ERROR_MAX) { 1294 if (floppy->failed_pc != NULL) { 1295 if (idefloppy_should_report_error(floppy)) 1296 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1297 " key = %2x, asc = %2x, ascq = %2x\n", 1298 drive->name, floppy->failed_pc->c[0], 1299 floppy->sense_key, floppy->asc, floppy->ascq); 1300 } 1301 else 1302 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1303 drive->name); 1304 idefloppy_do_end_request(drive, 0, 0); 1305 return ide_stopped; 1306 } 1307 if (rq->flags & REQ_CMD) { 1308 if (((long)rq->sector % floppy->bs_factor) || 1309 (rq->nr_sectors % floppy->bs_factor)) { 1310 printk("%s: unsupported r/w request size\n", 1311 drive->name); 1312 idefloppy_do_end_request(drive, 0, 0); 1313 return ide_stopped; 1314 } 1315 pc = idefloppy_next_pc_storage(drive); 1316 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1317 } else if (rq->flags & REQ_SPECIAL) { 1318 pc = (idefloppy_pc_t *) rq->buffer; 1319 } else if (rq->flags & REQ_BLOCK_PC) { 1320 pc = idefloppy_next_pc_storage(drive); 1321 if (idefloppy_blockpc_cmd(floppy, pc, rq)) { 1322 idefloppy_do_end_request(drive, 0, 0); 1323 return ide_stopped; 1324 } 1325 } else { 1326 blk_dump_rq_flags(rq, 1327 "ide-floppy: unsupported command in queue"); 1328 idefloppy_do_end_request(drive, 0, 0); 1329 return ide_stopped; 1330 } 1331 1332 pc->rq = rq; 1333 return idefloppy_issue_pc(drive, pc); 1334} 1335 1336/* 1337 * idefloppy_queue_pc_tail adds a special packet command request to the 1338 * tail of the request queue, and waits for it to be serviced. 1339 */ 1340static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1341{ 1342 struct ide_floppy_obj *floppy = drive->driver_data; 1343 struct request rq; 1344 1345 ide_init_drive_cmd (&rq); 1346 rq.buffer = (char *) pc; 1347 rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ; 1348 rq.rq_disk = floppy->disk; 1349 1350 return ide_do_drive_cmd(drive, &rq, ide_wait); 1351} 1352 1353/* 1354 * Look at the flexible disk page parameters. We will ignore the CHS 1355 * capacity parameters and use the LBA parameters instead. 1356 */ 1357static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) 1358{ 1359 idefloppy_floppy_t *floppy = drive->driver_data; 1360 idefloppy_pc_t pc; 1361 idefloppy_mode_parameter_header_t *header; 1362 idefloppy_flexible_disk_page_t *page; 1363 int capacity, lba_capacity; 1364 1365 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); 1366 if (idefloppy_queue_pc_tail(drive,&pc)) { 1367 printk(KERN_ERR "ide-floppy: Can't get flexible disk " 1368 "page parameters\n"); 1369 return 1; 1370 } 1371 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1372 floppy->wp = header->wp; 1373 set_disk_ro(floppy->disk, floppy->wp); 1374 page = (idefloppy_flexible_disk_page_t *) (header + 1); 1375 1376 page->transfer_rate = ntohs(page->transfer_rate); 1377 page->sector_size = ntohs(page->sector_size); 1378 page->cyls = ntohs(page->cyls); 1379 page->rpm = ntohs(page->rpm); 1380 capacity = page->cyls * page->heads * page->sectors * page->sector_size; 1381 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) 1382 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1383 "%d sector size, %d rpm\n", 1384 drive->name, capacity / 1024, page->cyls, 1385 page->heads, page->sectors, 1386 page->transfer_rate / 8, page->sector_size, page->rpm); 1387 1388 floppy->flexible_disk_page = *page; 1389 drive->bios_cyl = page->cyls; 1390 drive->bios_head = page->heads; 1391 drive->bios_sect = page->sectors; 1392 lba_capacity = floppy->blocks * floppy->block_size; 1393 if (capacity < lba_capacity) { 1394 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1395 "bytes, but the drive only handles %d\n", 1396 drive->name, lba_capacity, capacity); 1397 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; 1398 } 1399 return 0; 1400} 1401 1402static int idefloppy_get_capability_page(ide_drive_t *drive) 1403{ 1404 idefloppy_floppy_t *floppy = drive->driver_data; 1405 idefloppy_pc_t pc; 1406 idefloppy_mode_parameter_header_t *header; 1407 idefloppy_capabilities_page_t *page; 1408 1409 floppy->srfp = 0; 1410 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1411 MODE_SENSE_CURRENT); 1412 1413 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1414 if (idefloppy_queue_pc_tail(drive,&pc)) { 1415 return 1; 1416 } 1417 1418 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1419 page= (idefloppy_capabilities_page_t *)(header+1); 1420 floppy->srfp = page->srfp; 1421 return (0); 1422} 1423 1424/* 1425 * Determine if a media is present in the floppy drive, and if so, 1426 * its LBA capacity. 1427 */ 1428static int idefloppy_get_capacity (ide_drive_t *drive) 1429{ 1430 idefloppy_floppy_t *floppy = drive->driver_data; 1431 idefloppy_pc_t pc; 1432 idefloppy_capacity_header_t *header; 1433 idefloppy_capacity_descriptor_t *descriptor; 1434 int i, descriptors, rc = 1, blocks, length; 1435 1436 drive->bios_cyl = 0; 1437 drive->bios_head = drive->bios_sect = 0; 1438 floppy->blocks = floppy->bs_factor = 0; 1439 set_capacity(floppy->disk, 0); 1440 1441 idefloppy_create_read_capacity_cmd(&pc); 1442 if (idefloppy_queue_pc_tail(drive, &pc)) { 1443 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1444 return 1; 1445 } 1446 header = (idefloppy_capacity_header_t *) pc.buffer; 1447 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1448 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1449 1450 for (i = 0; i < descriptors; i++, descriptor++) { 1451 blocks = descriptor->blocks = ntohl(descriptor->blocks); 1452 length = descriptor->length = ntohs(descriptor->length); 1453 1454 if (!i) 1455 { 1456 switch (descriptor->dc) { 1457 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1458 case CAPACITY_UNFORMATTED: 1459 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1460 /* 1461 * If it is not a clik drive, break out 1462 * (maintains previous driver behaviour) 1463 */ 1464 break; 1465 case CAPACITY_CURRENT: 1466 /* Normal Zip/LS-120 disks */ 1467 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1468 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1469 "sector size\n", drive->name, 1470 blocks * length / 1024, blocks, length); 1471 floppy->capacity = *descriptor; 1472 if (!length || length % 512) { 1473 printk(KERN_NOTICE "%s: %d bytes block size " 1474 "not supported\n", drive->name, length); 1475 } else { 1476 floppy->blocks = blocks; 1477 floppy->block_size = length; 1478 if ((floppy->bs_factor = length / 512) != 1) 1479 printk(KERN_NOTICE "%s: warning: non " 1480 "512 bytes block size not " 1481 "fully supported\n", 1482 drive->name); 1483 rc = 0; 1484 } 1485 break; 1486 case CAPACITY_NO_CARTRIDGE: 1487 /* 1488 * This is a KERN_ERR so it appears on screen 1489 * for the user to see 1490 */ 1491 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1492 break; 1493 case CAPACITY_INVALID: 1494 printk(KERN_ERR "%s: Invalid capacity for disk " 1495 "in drive\n", drive->name); 1496 break; 1497 } 1498 } 1499 if (!i) { 1500 debug_log( "Descriptor 0 Code: %d\n", 1501 descriptor->dc); 1502 } 1503 debug_log( "Descriptor %d: %dkB, %d blocks, %d " 1504 "sector size\n", i, blocks * length / 1024, blocks, 1505 length); 1506 } 1507 1508 /* Clik! disk does not support get_flexible_disk_page */ 1509 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1510 (void) idefloppy_get_flexible_disk_page(drive); 1511 } 1512 1513 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1514 return rc; 1515} 1516 1517/* 1518** Obtain the list of formattable capacities. 1519** Very similar to idefloppy_get_capacity, except that we push the capacity 1520** descriptors to userland, instead of our own structures. 1521** 1522** Userland gives us the following structure: 1523** 1524** struct idefloppy_format_capacities { 1525** int nformats; 1526** struct { 1527** int nblocks; 1528** int blocksize; 1529** } formats[]; 1530** } ; 1531** 1532** userland initializes nformats to the number of allocated formats[] 1533** records. On exit we set nformats to the number of records we've 1534** actually initialized. 1535** 1536*/ 1537 1538static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1539{ 1540 idefloppy_pc_t pc; 1541 idefloppy_capacity_header_t *header; 1542 idefloppy_capacity_descriptor_t *descriptor; 1543 int i, descriptors, blocks, length; 1544 int u_array_size; 1545 int u_index; 1546 int __user *argp; 1547 1548 if (get_user(u_array_size, arg)) 1549 return (-EFAULT); 1550 1551 if (u_array_size <= 0) 1552 return (-EINVAL); 1553 1554 idefloppy_create_read_capacity_cmd(&pc); 1555 if (idefloppy_queue_pc_tail(drive, &pc)) { 1556 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1557 return (-EIO); 1558 } 1559 header = (idefloppy_capacity_header_t *) pc.buffer; 1560 descriptors = header->length / 1561 sizeof(idefloppy_capacity_descriptor_t); 1562 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1563 1564 u_index = 0; 1565 argp = arg + 1; 1566 1567 /* 1568 ** We always skip the first capacity descriptor. That's the 1569 ** current capacity. We are interested in the remaining descriptors, 1570 ** the formattable capacities. 1571 */ 1572 1573 for (i=0; i<descriptors; i++, descriptor++) { 1574 if (u_index >= u_array_size) 1575 break; /* User-supplied buffer too small */ 1576 if (i == 0) 1577 continue; /* Skip the first descriptor */ 1578 1579 blocks = ntohl(descriptor->blocks); 1580 length = ntohs(descriptor->length); 1581 1582 if (put_user(blocks, argp)) 1583 return(-EFAULT); 1584 ++argp; 1585 1586 if (put_user(length, argp)) 1587 return (-EFAULT); 1588 ++argp; 1589 1590 ++u_index; 1591 } 1592 1593 if (put_user(u_index, arg)) 1594 return (-EFAULT); 1595 return (0); 1596} 1597 1598/* 1599** Send ATAPI_FORMAT_UNIT to the drive. 1600** 1601** Userland gives us the following structure: 1602** 1603** struct idefloppy_format_command { 1604** int nblocks; 1605** int blocksize; 1606** int flags; 1607** } ; 1608** 1609** flags is a bitmask, currently, the only defined flag is: 1610** 1611** 0x01 - verify media after format. 1612*/ 1613 1614static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1615{ 1616 int blocks; 1617 int length; 1618 int flags; 1619 idefloppy_pc_t pc; 1620 1621 if (get_user(blocks, arg) || 1622 get_user(length, arg+1) || 1623 get_user(flags, arg+2)) { 1624 return (-EFAULT); 1625 } 1626 1627 /* Get the SFRP bit */ 1628 (void) idefloppy_get_capability_page(drive); 1629 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1630 if (idefloppy_queue_pc_tail(drive, &pc)) { 1631 return (-EIO); 1632 } 1633 1634 return (0); 1635} 1636 1637/* 1638** Get ATAPI_FORMAT_UNIT progress indication. 1639** 1640** Userland gives a pointer to an int. The int is set to a progresss 1641** indicator 0-65536, with 65536=100%. 1642** 1643** If the drive does not support format progress indication, we just check 1644** the dsc bit, and return either 0 or 65536. 1645*/ 1646 1647static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1648{ 1649 idefloppy_floppy_t *floppy = drive->driver_data; 1650 idefloppy_pc_t pc; 1651 int progress_indication = 0x10000; 1652 1653 if (floppy->srfp) { 1654 idefloppy_create_request_sense_cmd(&pc); 1655 if (idefloppy_queue_pc_tail(drive, &pc)) { 1656 return (-EIO); 1657 } 1658 1659 if (floppy->sense_key == 2 && 1660 floppy->asc == 4 && 1661 floppy->ascq == 4) { 1662 progress_indication = floppy->progress_indication; 1663 } 1664 /* Else assume format_unit has finished, and we're 1665 ** at 0x10000 */ 1666 } else { 1667 atapi_status_t status; 1668 unsigned long flags; 1669 1670 local_irq_save(flags); 1671 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 1672 local_irq_restore(flags); 1673 1674 progress_indication = !status.b.dsc ? 0 : 0x10000; 1675 } 1676 if (put_user(progress_indication, arg)) 1677 return (-EFAULT); 1678 1679 return (0); 1680} 1681 1682/* 1683 * Return the current floppy capacity. 1684 */ 1685static sector_t idefloppy_capacity (ide_drive_t *drive) 1686{ 1687 idefloppy_floppy_t *floppy = drive->driver_data; 1688 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1689 1690 return capacity; 1691} 1692 1693/* 1694 * idefloppy_identify_device checks if we can support a drive, 1695 * based on the ATAPI IDENTIFY command results. 1696 */ 1697static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1698{ 1699 struct idefloppy_id_gcw gcw; 1700#if IDEFLOPPY_DEBUG_INFO 1701 u16 mask,i; 1702 char buffer[80]; 1703#endif /* IDEFLOPPY_DEBUG_INFO */ 1704 1705 *((u16 *) &gcw) = id->config; 1706 1707#ifdef CONFIG_PPC 1708 /* kludge for Apple PowerBook internal zip */ 1709 if ((gcw.device_type == 5) && 1710 !strstr(id->model, "CD-ROM") && 1711 strstr(id->model, "ZIP")) 1712 gcw.device_type = 0; 1713#endif 1714 1715#if IDEFLOPPY_DEBUG_INFO 1716 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1717 switch (gcw.protocol) { 1718 case 0: case 1: sprintf(buffer, "ATA");break; 1719 case 2: sprintf(buffer, "ATAPI");break; 1720 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1721 } 1722 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1723 switch (gcw.device_type) { 1724 case 0: sprintf(buffer, "Direct-access Device");break; 1725 case 1: sprintf(buffer, "Streaming Tape Device");break; 1726 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1727 case 5: sprintf(buffer, "CD-ROM Device");break; 1728 case 6: sprintf(buffer, "Reserved"); 1729 case 7: sprintf(buffer, "Optical memory Device");break; 1730 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1731 default: sprintf(buffer, "Reserved"); 1732 } 1733 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1734 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1735 switch (gcw.drq_type) { 1736 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1737 case 1: sprintf(buffer, "Interrupt DRQ");break; 1738 case 2: sprintf(buffer, "Accelerated DRQ");break; 1739 case 3: sprintf(buffer, "Reserved");break; 1740 } 1741 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1742 switch (gcw.packet_size) { 1743 case 0: sprintf(buffer, "12 bytes");break; 1744 case 1: sprintf(buffer, "16 bytes");break; 1745 default: sprintf(buffer, "Reserved");break; 1746 } 1747 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1748 printk(KERN_INFO "Model: %.40s\n",id->model); 1749 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); 1750 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no); 1751 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); 1752 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); 1753 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); 1754 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); 1755 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); 1756 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); 1757 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); 1758 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); 1759 printk(KERN_INFO "Single Word DMA supported modes:\n"); 1760 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1761 if (id->dma_1word & mask) 1762 printk(KERN_INFO " Mode %d%s\n", i, 1763 (id->dma_1word & (mask << 8)) ? " (active)" : ""); 1764 } 1765 printk(KERN_INFO "Multi Word DMA supported modes:\n"); 1766 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1767 if (id->dma_mword & mask) 1768 printk(KERN_INFO " Mode %d%s\n", i, 1769 (id->dma_mword & (mask << 8)) ? " (active)" : ""); 1770 } 1771 if (id->field_valid & 0x0002) { 1772 printk(KERN_INFO "Enhanced PIO Modes: %s\n", 1773 id->eide_pio_modes & 1 ? "Mode 3":"None"); 1774 if (id->eide_dma_min == 0) 1775 sprintf(buffer, "Not supported"); 1776 else 1777 sprintf(buffer, "%d ns",id->eide_dma_min); 1778 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); 1779 if (id->eide_dma_time == 0) 1780 sprintf(buffer, "Not supported"); 1781 else 1782 sprintf(buffer, "%d ns",id->eide_dma_time); 1783 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); 1784 if (id->eide_pio == 0) 1785 sprintf(buffer, "Not supported"); 1786 else 1787 sprintf(buffer, "%d ns",id->eide_pio); 1788 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n", 1789 buffer); 1790 if (id->eide_pio_iordy == 0) 1791 sprintf(buffer, "Not supported"); 1792 else 1793 sprintf(buffer, "%d ns",id->eide_pio_iordy); 1794 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); 1795 } else 1796 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n"); 1797#endif /* IDEFLOPPY_DEBUG_INFO */ 1798 1799 if (gcw.protocol != 2) 1800 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1801 else if (gcw.device_type != 0) 1802 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1803 else if (!gcw.removable) 1804 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1805 else if (gcw.drq_type == 3) { 1806 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1807 } else if (gcw.packet_size != 0) { 1808 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1809 } else 1810 return 1; 1811 return 0; 1812} 1813 1814static void idefloppy_add_settings(ide_drive_t *drive) 1815{ 1816 idefloppy_floppy_t *floppy = drive->driver_data; 1817 1818/* 1819 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function 1820 */ 1821 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1822 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1823 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1824 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1825} 1826 1827/* 1828 * Driver initialization. 1829 */ 1830static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1831{ 1832 struct idefloppy_id_gcw gcw; 1833 1834 *((u16 *) &gcw) = drive->id->config; 1835 floppy->pc = floppy->pc_stack; 1836 if (gcw.drq_type == 1) 1837 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1838 /* 1839 * We used to check revisions here. At this point however 1840 * I'm giving up. Just assume they are all broken, its easier. 1841 * 1842 * The actual reason for the workarounds was likely 1843 * a driver bug after all rather than a firmware bug, 1844 * and the workaround below used to hide it. It should 1845 * be fixed as of version 1.9, but to be on the safe side 1846 * we'll leave the limitation below for the 2.2.x tree. 1847 */ 1848 1849 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1850 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1851 /* This value will be visible in the /proc/ide/hdx/settings */ 1852 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1853 blk_queue_max_sectors(drive->queue, 64); 1854 } 1855 1856 /* 1857 * Guess what? The IOMEGA Clik! drive also needs the 1858 * above fix. It makes nasty clicking noises without 1859 * it, so please don't remove this. 1860 */ 1861 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1862 blk_queue_max_sectors(drive->queue, 64); 1863 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1864 } 1865 1866 1867 (void) idefloppy_get_capacity(drive); 1868 idefloppy_add_settings(drive); 1869} 1870 1871static void ide_floppy_remove(ide_drive_t *drive) 1872{ 1873 idefloppy_floppy_t *floppy = drive->driver_data; 1874 struct gendisk *g = floppy->disk; 1875 1876 ide_unregister_subdriver(drive, floppy->driver); 1877 1878 del_gendisk(g); 1879 1880 ide_floppy_put(floppy); 1881} 1882 1883static void ide_floppy_release(struct kref *kref) 1884{ 1885 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1886 ide_drive_t *drive = floppy->drive; 1887 struct gendisk *g = floppy->disk; 1888 1889 drive->driver_data = NULL; 1890 g->private_data = NULL; 1891 put_disk(g); 1892 kfree(floppy); 1893} 1894 1895#ifdef CONFIG_PROC_FS 1896 1897static int proc_idefloppy_read_capacity 1898 (char *page, char **start, off_t off, int count, int *eof, void *data) 1899{ 1900 ide_drive_t*drive = (ide_drive_t *)data; 1901 int len; 1902 1903 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1904 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1905} 1906 1907static ide_proc_entry_t idefloppy_proc[] = { 1908 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1909 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1910 { NULL, 0, NULL, NULL } 1911}; 1912 1913#else 1914 1915#define idefloppy_proc NULL 1916 1917#endif /* CONFIG_PROC_FS */ 1918 1919static int ide_floppy_probe(ide_drive_t *); 1920 1921static ide_driver_t idefloppy_driver = { 1922 .gen_driver = { 1923 .owner = THIS_MODULE, 1924 .name = "ide-floppy", 1925 .bus = &ide_bus_type, 1926 }, 1927 .probe = ide_floppy_probe, 1928 .remove = ide_floppy_remove, 1929 .version = IDEFLOPPY_VERSION, 1930 .media = ide_floppy, 1931 .supports_dsc_overlap = 0, 1932 .do_request = idefloppy_do_request, 1933 .end_request = idefloppy_do_end_request, 1934 .error = __ide_error, 1935 .abort = __ide_abort, 1936 .proc = idefloppy_proc, 1937}; 1938 1939static int idefloppy_open(struct inode *inode, struct file *filp) 1940{ 1941 struct gendisk *disk = inode->i_bdev->bd_disk; 1942 struct ide_floppy_obj *floppy; 1943 ide_drive_t *drive; 1944 idefloppy_pc_t pc; 1945 int ret = 0; 1946 1947 debug_log(KERN_INFO "Reached idefloppy_open\n"); 1948 1949 if (!(floppy = ide_floppy_get(disk))) 1950 return -ENXIO; 1951 1952 drive = floppy->drive; 1953 1954 drive->usage++; 1955 1956 if (drive->usage == 1) { 1957 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1958 /* Just in case */ 1959 1960 idefloppy_create_test_unit_ready_cmd(&pc); 1961 if (idefloppy_queue_pc_tail(drive, &pc)) { 1962 idefloppy_create_start_stop_cmd(&pc, 1); 1963 (void) idefloppy_queue_pc_tail(drive, &pc); 1964 } 1965 1966 if (idefloppy_get_capacity (drive) 1967 && (filp->f_flags & O_NDELAY) == 0 1968 /* 1969 ** Allow O_NDELAY to open a drive without a disk, or with 1970 ** an unreadable disk, so that we can get the format 1971 ** capacity of the drive or begin the format - Sam 1972 */ 1973 ) { 1974 drive->usage--; 1975 ret = -EIO; 1976 goto out_put_floppy; 1977 } 1978 1979 if (floppy->wp && (filp->f_mode & 2)) { 1980 drive->usage--; 1981 ret = -EROFS; 1982 goto out_put_floppy; 1983 } 1984 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1985 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1986 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1987 idefloppy_create_prevent_cmd(&pc, 1); 1988 (void) idefloppy_queue_pc_tail(drive, &pc); 1989 } 1990 check_disk_change(inode->i_bdev); 1991 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1992 drive->usage--; 1993 ret = -EBUSY; 1994 goto out_put_floppy; 1995 } 1996 return 0; 1997 1998out_put_floppy: 1999 ide_floppy_put(floppy); 2000 return ret; 2001} 2002 2003static int idefloppy_release(struct inode *inode, struct file *filp) 2004{ 2005 struct gendisk *disk = inode->i_bdev->bd_disk; 2006 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2007 ide_drive_t *drive = floppy->drive; 2008 idefloppy_pc_t pc; 2009 2010 debug_log(KERN_INFO "Reached idefloppy_release\n"); 2011 2012 if (drive->usage == 1) { 2013 /* IOMEGA Clik! drives do not support lock/unlock commands */ 2014 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2015 idefloppy_create_prevent_cmd(&pc, 0); 2016 (void) idefloppy_queue_pc_tail(drive, &pc); 2017 } 2018 2019 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2020 } 2021 drive->usage--; 2022 2023 ide_floppy_put(floppy); 2024 2025 return 0; 2026} 2027 2028static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 2029{ 2030 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2031 ide_drive_t *drive = floppy->drive; 2032 2033 geo->heads = drive->bios_head; 2034 geo->sectors = drive->bios_sect; 2035 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 2036 return 0; 2037} 2038 2039static int idefloppy_ioctl(struct inode *inode, struct file *file, 2040 unsigned int cmd, unsigned long arg) 2041{ 2042 struct block_device *bdev = inode->i_bdev; 2043 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2044 ide_drive_t *drive = floppy->drive; 2045 void __user *argp = (void __user *)arg; 2046 int err; 2047 int prevent = (arg) ? 1 : 0; 2048 idefloppy_pc_t pc; 2049 2050 switch (cmd) { 2051 case CDROMEJECT: 2052 prevent = 0; 2053 /* fall through */ 2054 case CDROM_LOCKDOOR: 2055 if (drive->usage > 1) 2056 return -EBUSY; 2057 2058 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 2059 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2060 idefloppy_create_prevent_cmd(&pc, prevent); 2061 (void) idefloppy_queue_pc_tail(drive, &pc); 2062 } 2063 if (cmd == CDROMEJECT) { 2064 idefloppy_create_start_stop_cmd(&pc, 2); 2065 (void) idefloppy_queue_pc_tail(drive, &pc); 2066 } 2067 return 0; 2068 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 2069 return 0; 2070 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 2071 return idefloppy_get_format_capacities(drive, argp); 2072 case IDEFLOPPY_IOCTL_FORMAT_START: 2073 2074 if (!(file->f_mode & 2)) 2075 return -EPERM; 2076 2077 if (drive->usage > 1) { 2078 /* Don't format if someone is using the disk */ 2079 2080 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 2081 &floppy->flags); 2082 return -EBUSY; 2083 } 2084 2085 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2086 2087 err = idefloppy_begin_format(drive, argp); 2088 if (err) 2089 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2090 return err; 2091 /* 2092 ** Note, the bit will be cleared when the device is 2093 ** closed. This is the cleanest way to handle the 2094 ** situation where the drive does not support 2095 ** format progress reporting. 2096 */ 2097 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 2098 return idefloppy_get_format_progress(drive, argp); 2099 } 2100 return generic_ide_ioctl(drive, file, bdev, cmd, arg); 2101} 2102 2103static int idefloppy_media_changed(struct gendisk *disk) 2104{ 2105 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2106 ide_drive_t *drive = floppy->drive; 2107 2108 /* do not scan partitions twice if this is a removable device */ 2109 if (drive->attach) { 2110 drive->attach = 0; 2111 return 0; 2112 } 2113 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 2114} 2115 2116static int idefloppy_revalidate_disk(struct gendisk *disk) 2117{ 2118 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2119 set_capacity(disk, idefloppy_capacity(floppy->drive)); 2120 return 0; 2121} 2122 2123static struct block_device_operations idefloppy_ops = { 2124 .owner = THIS_MODULE, 2125 .open = idefloppy_open, 2126 .release = idefloppy_release, 2127 .ioctl = idefloppy_ioctl, 2128 .getgeo = idefloppy_getgeo, 2129 .media_changed = idefloppy_media_changed, 2130 .revalidate_disk= idefloppy_revalidate_disk 2131}; 2132 2133static int ide_floppy_probe(ide_drive_t *drive) 2134{ 2135 idefloppy_floppy_t *floppy; 2136 struct gendisk *g; 2137 2138 if (!strstr("ide-floppy", drive->driver_req)) 2139 goto failed; 2140 if (!drive->present) 2141 goto failed; 2142 if (drive->media != ide_floppy) 2143 goto failed; 2144 if (!idefloppy_identify_device (drive, drive->id)) { 2145 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 2146 goto failed; 2147 } 2148 if (drive->scsi) { 2149 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 2150 goto failed; 2151 } 2152 if ((floppy = (idefloppy_floppy_t *) kzalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 2153 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 2154 goto failed; 2155 } 2156 2157 g = alloc_disk(1 << PARTN_BITS); 2158 if (!g) 2159 goto out_free_floppy; 2160 2161 ide_init_disk(g, drive); 2162 2163 ide_register_subdriver(drive, &idefloppy_driver); 2164 2165 kref_init(&floppy->kref); 2166 2167 floppy->drive = drive; 2168 floppy->driver = &idefloppy_driver; 2169 floppy->disk = g; 2170 2171 g->private_data = &floppy->driver; 2172 2173 drive->driver_data = floppy; 2174 2175 idefloppy_setup (drive, floppy); 2176 2177 g->minors = 1 << PARTN_BITS; 2178 g->driverfs_dev = &drive->gendev; 2179 strcpy(g->devfs_name, drive->devfs_name); 2180 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 2181 g->fops = &idefloppy_ops; 2182 drive->attach = 1; 2183 add_disk(g); 2184 return 0; 2185 2186out_free_floppy: 2187 kfree(floppy); 2188failed: 2189 return -ENODEV; 2190} 2191 2192MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 2193 2194static void __exit idefloppy_exit (void) 2195{ 2196 driver_unregister(&idefloppy_driver.gen_driver); 2197} 2198 2199static int __init idefloppy_init(void) 2200{ 2201 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 2202 return driver_register(&idefloppy_driver.gen_driver); 2203} 2204 2205MODULE_ALIAS("ide:*m-floppy*"); 2206module_init(idefloppy_init); 2207module_exit(idefloppy_exit); 2208MODULE_LICENSE("GPL"); 2209